I would bet that this had everything to do with it:

http://www.noaanews.noaa.gov/stories2005/s2437.htm

Brian Cluff
Team Snaptek

Apryl Clark wrote:
> Did anyone else have any problems caching on Sunday morning? I tried to 
> do 4 caches and spent over an hour just trying to find a general 100 
> foot area around them. They were in the zip code 85304 but again my GPS 
> would say .1 miles East then 2568 miles North??? It was nuts. I finally 
> gave up after a very very frusterating hour. As well I put in fresh 
> batteries. OH yeah..and it made me reinitialize it 3 different times???
>  
> Please tell me my GPS isn't crapping out on me!!! HELP
>  
> Apryl
> 
> 
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